Since concrete blocks are used for construction, no studies have been made to test the extent of chemicals leaching from the blocks into the surrounding soil. To reduce the cost of manufacturing concrete blocks, more industrial wastes are being used in new concrete blocks -- coal power plant fly ash and blast furnace slag (sources of arsenic, boron, and heavy metals). The extent of leaching over time is unknown. As with using treated lumber, lining your bed with BPA-free plastic may be a good solution.
Since concrete blocks are used for construction, no studies have been made to test the extent of chemicals leaching from the blocks into the surrounding soil. To reduce the cost of manufacturing concrete blocks, more industrial wastes are being used in new concrete blocks -- coal power plant fly ash and blast furnace slag (sources of arsenic, boron, and heavy metals). The extent of leaching over time is unknown. As with using treated lumber, lining your bed with BPA-free plastic may be a good solution.
Thank you
They haven't used that in concrete since the 60's
That's why there are no cinder blocks anymore
Thanks. But as mine were recycled you never know how old they are. Likely not that old but good for others to know
A properly constructed concrete bed will last forever and not fall apart like yours. It is a lot of work before the first block is laid though.
That's fair... I did not do any sort of leveling or prep work with that one. Despite that I got another season out of it with no issues